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Grammage

31.10.2011 - Cartonboard Know-How

Grammage refers to the weight of the cartonboard in grams per square metre (g/m²).

Unit

g/m2

Test Standard

EN ISO 536      

General information 

A fundamental physical property that defines a cartonboard is the grammage (basis weight). The grammage of a cartonboard is measured according to EN ISO 536 and indicates the weight of a cartonboard per area in g/m². The determination of the grammage is carried out by gravimetric methods. The total mass is the sum of fibre materials, coating, fillers, additives and water.

Additional details – practical relevance

The basis weight consists of the combined weight of the uncoated cartonboard and the coating. The proportion of coating used reduces the proportion of fibres (e.g. at lower grammages), which results in loss of strength and stiffness, especially at low grammages.